Open AccessStudy of thermally poled fibers with a two-dimensional model
Author(s) -
Alexandre R. Camara,
Oleksandr Tarasenko,
Walter Margulis
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.017700
Subject(s) - poling , nonlinear system , materials science , optics , ion , sign (mathematics) , nonlinear optics , optical fiber , thermal , voltage , fiber , mechanics , physics , thermodynamics , composite material , optoelectronics , mathematical analysis , mathematics , quantum mechanics , dielectric , ferroelectricity
A two-dimensional (2D) numerical model is implemented to describe the movement of ions under thermal poling for the specific case of optical fibers. Three types of cations are considered (representing Na(+), Li(+) and H3O(+)) of different mobility values. A cross-sectional map of the carrier concentration is obtained as a function of time. The role of the various cations is investigated. The assumptions of the model are validated by comparing the predictions to experimental data of the time evolution of the nonlinearity induced. A variational analysis of poling parameters including temperature, poling voltage, sign of the bias potential and initial ionic concentrations is performed for a particular fiber geometry. The analysis allows identifying the impact of these parameters on the induced second-order nonlinearity in poled fibers.